Grimm SMPS Scanning Electromigration Particle Size Spectrometer from Germany

The SMPS Scanning Mobility Particle Sizer is a nanoparticle size analysis system composed of DMA+PCC or DMA+FCE, used for particle analysis from 5nm to 1100nm.

DMA (Differential Mobility Analyzer) is used to classify particulate matter. To reduce the interference of large particles, coarse particles are removed through a cutting head. At the same time, to eliminate the influence of charge on aerosol particles, it is recommended to install an electrostatic neutralizer in advance. The top entrance of DMA is designed in a U-shape to reduce particle loss; The top is equipped with a laminar flow device, allowing the airflow to flow in a laminar state. Clean and dry protective sheath gas flows together with aerosol airflow from top to bottom. The outer sleeve of DMA is grounded, and the central pole is connected to a positive pressure high-voltage generator. Particles with negative charges in the environmental particles will migrate in the electric field between the outer sleeve and the central pole. At a certain voltage (corresponding to a certain electric field strength), negatively charged particles with a certain charge to mass ratio will migrate to the lower slit of DMA and escape, while the remaining charge to mass ratios and their electrically neutral and positively charged particles will be filtered and discharged with the excess airflow. The particles escaping through the slit are monodisperse aerosol particles, which enter the CPC Condensation Particle Counters or FCE Faraday Electrostatic Precipitator to count the particles.

The software controls the voltage scanning mode, which can achieve scanning and detection of the concentration distribution of particles with different sizes. Therefore, it is called a scanning electric mobility particle size spectrometer. Its particle size resolution is very high, and it can reach 256 particle size channels within the measurable particle size range. Two different DMAs can be used to measure particle size ranges of 5-350nm and 10-1100nm, respectively; CPC adopts a single particle counting mode with a concentration of up to 15000 P/cm3, and can measure concentrations up to 107 P/cm3 using a photometer mode. Therefore, the measured concentration of SMPS can reach 108 P/cm3.

The system has a fixed monitoring SMPS system and a mobile SMPS system, and the measurement range of particle size varies depending on DMA or CPC.

DMA can be divided into L-DMA and M-DMA according to different particle size ranges

Technical Specifications:

Particle size range: 5.4-358 nm (M-DMA)

11 – 1110 nm (L-DMA)

Particle size resolution: standard 44 channels, can be optimized to 256 channels

Gas flow rate:

Sample gas: 0.3 L/min

Sheath gas: 3.0 L/min

Flow rate control:

Carrier gas: The flow rate is controlled by the pressure difference of the nozzle sensor, which is insensitive to environmental vibrations

Fluid system

Working Fluid: 1-Butanol (Reagent grade p.A.)

液体除去： Continuous drain with a micro-pump into drain bottle

Communication: RS-232 9-pin D connector,

ASCII format, PCMCIA SRAM 4MB

Can connect three analog signal meteorological or gas sensors

Operating conditions:

Environmental temperature: 10 to 35 ° C (50 to 95 ° F)

Environmental humidity: 0 to 95% RH, non condensing

Pressure: Environmental pressure ± 50 mbar

Power supply: 85-264 VAC wide voltage,

U-DMA:

Vienna Type Differential Mobility Analyzer Vienna Type DMA

size

Internal diameter of external electrode: 40mm

Internal electrode inner diameter: 26 mm

power supply

High voltage output module: 5-10000V, positive inner electrode (negative available on request)

High voltage input module: Module 0-10 V, from CPC or DMA controller

High voltage safety guarantee: turn on DMA and automatically turn off high voltage SA

Sensors (internal): temperature, pressure, pressure difference between two nozzles

Electrostatic precipitatorSMPS+CScanning electric mobility particle size spectrometer

FAPESRapid aerosol particle emission detection system（Fast Aerosol Particle Emission Spectrometer）,The system is composed of1group12aDMAAnd a high-performance Faraday cup electrostatic meterFCEComposition, rapid detection of aerosol particle emissions,200mscan detect255A channel.

Application:

System software interfaceUIFriendlyThe German Federal Environment Agency measures the particle size distribution of nanoparticles